Zone redundant storage

Zone redundant storage (ZRS) replicates three copies of data across two or three data centers within one of two regions asynchronously, plus the three copies of data stored within the same data center as the original source of the data.

Drawbacks

The following points are the drawbacks for using ZRS:

• This type can only be used for block blobs (one of the Azure services covered later in this chapter), and a standard storage account (general purpose standard storage accounts will be covered later in this chapter)
• Does not support metrics or logging
• Does not support conversion for other replication types, such as LRS, GRS, and vice versa
• If a disaster occurs, some data might be lost, because the data replicates to the other data centers asynchronously
• If a disaster occurs, there will be some delay in accessing your data until Microsoft failover to the secondary zone

Advantages

It provides higher durability and availability for data than LRS, as it not only replicates in the same data center, but also in other data centers.